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Finding the Fourth Proportional to 443,841.90, 665,654.85 and 128,265.90

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Solution

The fourth proportional to 443,841.90, 665,654.85 and 128,265.90 is: 192,367.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,841.90 : 665,654.85 = 128,265.90 : x
  2. Step 2: Convert to fraction form
    443,841.90/665,654.85 = 128,265.90/x
  3. Step 3: Cross multiply
    443,841.90x = 665,654.85 × 128,265.90
  4. Step 4: Simplify right side
    443,841.90x = 85,380,818,424.62
  5. Step 5: Solve for x
    x = 85,380,818,424.62/443,841.90
  6. Step 6: Final answer
    x = 192,367.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.